/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.apache.linkis.cs.listener.ListenerBus;

import org.apache.linkis.common.listener.Event;
import org.apache.linkis.common.listener.ListenerEventBus;
import org.apache.linkis.cs.listener.ContextAsyncEventListener;
import org.apache.linkis.cs.listener.conf.ContextListenerConf;


public class ContextAsyncListenerBus<L extends ContextAsyncEventListener, E extends Event> extends ListenerEventBus<L, E> {


    private static final String NAME = "ContextAsyncListenerBus";

    public ContextAsyncListenerBus() {
        super(ContextListenerConf.WDS_CS_LISTENER_ASYN_QUEUE_CAPACITY, NAME, ContextListenerConf.WDS_CS_LISTENER_ASYN_CONSUMER_THREAD_MAX, ContextListenerConf.WDS_CS_LISTENER_ASYN_CONSUMER_THREAD_FREE_TIME_MAX);
    }

    @Override
    public void doPostEvent(L listener, E event) {
        listener.onEvent(event);
    }


    private static ContextAsyncListenerBus contextAsyncListenerBus = null;

    public static ContextAsyncListenerBus getInstance() {
        if (contextAsyncListenerBus == null) {
            synchronized (ContextAsyncListenerBus.class) {
                if (contextAsyncListenerBus == null) {
                    contextAsyncListenerBus = new ContextAsyncListenerBus();
                    contextAsyncListenerBus.start();
                }
            }
        }
        return contextAsyncListenerBus;
    }
}
